Do it, pride flags are very important for us queer folk. They indicate which areas are generally safe and which aren't. The more proudly they're flown, the better. If you do, I recommend using the progress flag (with the triangle bit)

You don't have to be queer yourself to help make queer people feel safe

Not sure between the Mormons and Jehovah's Witnesses which of them is worse. They both share a lot of commonality. In that both were created by some dude to excuse their behavior and control the community (in my opinion). Obviously deeper than that and plenty of differences but both of them I find have pretty dubious history.